$-5x^3y^2-1+x;\:x=-3;\:y=-1$

$\frac{dy}{dx}=e^{\left(2x\right)}+e^{\left(-x\right)}+x$

$\frac{d}{dx}\:\:ax+cot\:ax$

$\lim_{x\to+\infty}\left(\frac{-\cos\left(x\right)}{x^2}\right)$

$2d^2-d-15$

$\lim_{x\to\infty}\left(2+x^3\right)^{\frac{1}{x}}$

$\:\:\:\:3\:\left(16\:-\:2\:+\:6\:-\:5\:\right)\:+\:5\:-\:\left(-\:8\:-\:6\:\right)$